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A method for extracting krill oil that can be used in ships

An extraction method and krill oil technology, which are applied in the directions of fat oil/fat production, fat oil/fat refining, fat production, etc., can solve the problems of oxidative loss of functional components, unsuitability for storage and use, danger, etc., and reduce oxidative deterioration. Dangerous, safe to eat, and the effect of short operation time

Active Publication Date: 2021-03-26
EAST CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Extraction workshops using organic solvents such as halogenated alkanes, alcohols, and acetone have the danger of explosion. These low-boiling organic solvents are especially not suitable for storage and use on Antarctic krill processing ships; conventional cooking methods to extract krill oil will cause ω Oxidative loss of functional components such as -3 polyunsaturated fatty acids, phospholipids, and astaxanthin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take 0.40kg of Antarctica krill frozen at -18℃, directly add 0.20L oleic acid to form a mixture, thaw at room temperature, pulverize and homogenize for 10 minutes; use a Buchner funnel to filter under reduced pressure with medium-speed qualitative filter paper, and collect the dark red oil in the upper layer of the supernatant Acidic organic phase; add 0.20L oleic acid to the lower layer of water and minced meat mixture to repeat the homogenization and filtration process once; combine the deep red oleic acid extract twice and store in refrigeration for later use.

[0026] Extraction of the water phase after oleic acid extraction and residual krill oil in minced meat: add 0.80 L of a mixed solvent of ethyl acetate to n-butanol with a volume ratio of 1:1 to the mixture of water and minced meat, pulverize and homogenize for 5 minutes; Filter under reduced pressure with fast qualitative filter paper in the funnel, collect the organic phase in the upper layer of the clear liq...

Embodiment 2

[0030] Take 0.40kg of Antarctica krill frozen at -18℃ and directly add 0.32L oleic acid to form a mixture, thaw at room temperature, pulverize and homogenize for 15 minutes; use a Buchner funnel to filter under reduced pressure with medium-speed qualitative filter paper, and collect the dark red oleic acid in the upper layer of the supernatant Organic phase; add 0.20 L of oleic acid to the lower layer of water and minced meat mixture to repeat the homogenization and filtration process once; combine the deep red oleic acid extract twice and store it in cold storage for later use.

[0031] Extraction of the water phase after oleic acid extraction and residual krill oil in minced meat: add 0.80 L of a mixed solvent of ethyl acetate to n-butanol with a volume ratio of 1:1 to the mixture of water and minced meat, pulverize and homogenize for 5 minutes; Filter under reduced pressure with fast qualitative filter paper in the funnel, collect the organic phase in the upper layer of the ...

Embodiment 3

[0037] Take 0.15kg of Antarctic krill shrimp powder, directly add 0.15L oleic acid to form a mixture, and homogenize for 10 minutes; use a Buchner funnel to filter under reduced pressure with medium-speed qualitative filter paper, and collect the dark red organic phase clear liquid; add 0.15L oleic acid to the minced meat Repeat the process of homogenization and filtration once; combine the dark red oleic acid extracts twice and store them in cold storage for later use.

[0038] Extraction of residual krill oil in minced meat after oleic acid extraction: add 0.225L ethanol to the minced meat to form a mixture, homogenate for 10 minutes; filter under reduced pressure with a medium-speed qualitative filter paper using a Buchner funnel, and collect the ethanol solution; add 0.225L ethanol to the minced meat Repeat the homogenization and filtration process once; combine the ethanol extracts twice, concentrate under reduced pressure to recover the solvent, and dry to obtain 23.8 g o...

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PUM

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Abstract

The invention discloses a shipborne method for extracting krill oil. The method comprises the following steps that a, fresh euphausia superba or euphausia superba meal and oleic acid which serve as raw materials are mixed, smashed and homogenized, wherein 0.5-1.5 L of oleic acid is used in each kilogram of the raw materials; b, clear liquid is obtained through solid-liquid separation, and an organic phase of the upper layer of the clear liquid is collected; c, an aqueous phase of the lower layer of the clear liquid is mixed with meat paste, oleic acid is added for repeated homogenate extraction and one time of solid-liquid separation, the organic phase is combined, and the product is dried to obtain total krill oil after molecular distillation. According to the method, oleic acid which ishigh in astaxanthin, unsaturated fatty acid glyceride and phospholipid dissolving capacity serves as an extraction agent, the whole extraction process is simple, the operation time is short, the temperature is low, krill oil extracts can be effectively obtained, the risk of oxidative deterioration in the preparation process can be reduced, the edible safety is better, and the method can be used for shipborne processing. Compared with extraction with organic solvents, the recycling rates of extracting the total krill oil from euphausia superba or euphausia superba meal by using oleic acid reach60.5-83.3% and 16.5-30.5% respectively.

Description

technical field [0001] The invention belongs to the technical field of extracting marine animal lipid components, and in particular relates to a method for extracting krill oil that can be used on ships. Background technique [0002] The conventional chemical solvent extraction method of marine animal lipid components generally includes the following processes: thawing of frozen individuals, crushing of slices, or crushing of freeze-dried individuals, and then extracting with organic solvents or / and water to obtain the total extract. The organic solvent used can be Alcohols, such as ethanol, methanol; after dissolving the total extract in water or methanol aqueous solution, use higher boiling point alkanes (petroleum ether, n-hexane, cyclohexane), or esters such as ethyl acetate, ethers such as diethyl ether, Extract with halogenated hydrocarbon solvents such as chloroform or dichloromethane, take the solvent extraction phase, recover the solvent and dry to obtain the lipid ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11B1/10C11B3/00
CPCC11B1/10C11B3/001
Inventor 田晓清樊成奇李灵智陆亚男黄洪亮
Owner EAST CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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